Attachments

Step 2: Plug Tiny Circuit to Arduino

After you built the circuit, you can plug it to your Arduino UNO board using the male header. (Pins GND,13,12,11)

Step 3: Upload the Sketch.

Now connect your Arduino UNO board to your computer and open the Arduino IDE.

Then download the sketch file i attached and open the .ino file using the Arduino IDE and upload it to your Arduino board. After the uploading process complete open the serial monitor in your Arduino IDE. Now you can see the message like 'Please attach your transistor'.